Horseshoe-bending machine



'(No Model.) 3 Sheets-Sheet 1.

,H. E. DARBY. HORSBSHOE BENDING MACHINE.

PatentedJanr 23, 1894.

' 4yuneaaes (No Model.) 3 Sheets-Sheet 2. H. E; DARBY.

HORSESHOE BE-NDING MACHINE.

No. 513,455. Patented Jan. 23, 1894.

HENRY E. DARBY, OF TROY, NEWV YORK, ASSIGNOR OF ONE-HALFTO JOHN A.MCGARRY, OF RICHMOND, VIRGINIA.

HQRSESHOEQBENDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 513,455, dated January23, 1894.

Applicationfiled June 23,1893. Serial No. 479,006. (No model.) f

To a whom it may concern.-

Be it known that I, HENRY E. DARBY, a citizen of the United States,residing at Troy, county of Rensselaer, and State of New York,

have invented certain new and useful Imelevation of my improvedhorseshoe-bending machine. Fig. 2 is atop plan view of the same. Fig. 3is a viewin side elevation of a portion of my improved machine showingthe relative position of the stripper and its actuating mechanism, theseveral shafts being shown in section. Fig. 4 is a viewin rear elevationof the stripper-head and supporting lever detached.

A- is the frame of the machine provided with the strengthening flange orrib A' and a supporting leg A under its forward end. The anvilA -issecured to or made a part of such leg and supports the forming-die Bdetachably secured to the anvil by the bolt B and nut B The bending-jaws0- and O extend rearwardly in the form of operating arms 0 and 0 whichare fulcrumed upon pivots O and C fixed in the carrier 0 movable uponthe slideway A formed on the main frame. The jaws are each provided withan underlying support G adapted to support the horse-shoe blanks at theproper level to engage the fixed formingdie as the blanks are severallyengaged by the jaws when the jaw-supporting carrier is moved backward.That portion of the jaws which engages a blank is made in the form of afriction-roller in the usual manner. Each of the jaws is also providedwith an overlying guide O which overlies the blank while it is beingbent to form the toe-portion of the shoe, and keeps all parts of theblank in apbe bent around the formingdie by the bending jaws. The"slide-carriage which carries the bending-jaws is connected by the linksD- with one arm of the bell-crank lever D mounted upon the shaft 'Dsupported in bearing D in the uprights D erectedfrom the mainframe. Theother arm of the bellcrank lever is connected by pitman D with thecrank-shaft D". The crank-shaft has its hearings in the main frame andis provided with an elliptical gear-wheel D fixed thereon to engage witha similar gear 13-, fixed upon the drive-shaft D which has its bearingsin the main frame and is provided with the drive-wheel D fixed thereon.The elliptical gear-wheels are connected by the rod D and each isprovided with teeth on the segments bisected by its major axis, asshown, and in the usual manner. The pitman also serves to actuate thestripper or clearerF- which is a rock-lever fulcrumed upon the shaft F-supported by the main frame. The short arm of the stripper-lever isconnected by link F with the short arm of the rock-lever F mounted uponshaft E- supported by. the main frame, and the long arm of the latterlever is connected with the pitman by the link F as shown in Fig. 3.

The reciprocating movements imparted to the slide-carrier by themechanism above described cause the jaw-pivots to reciprocate instraight lines, but the j aw-rolls which engage the blanks have a curvedpath determined by the shape and position of the stationary pattern-camsH, and l-1 The friction-rolls 0 and O on the jaw-arms travel along thecurved surfaces of the cams, and when the slide-carrier reaches thelimit of its backward movement they occupy the position indicated by thedotted circles 0 and O in Fig. 2; and the blankengaging rolls on thejaws occupy the position indicated by the dotted circles O, C' in thesame figure.

The position of the blank after it has been bent and formed on theforming-die is indicated by the dotted lines b in Fig. 2.

The cams 11- are shaped to give the desired form to the bend in the toeof the shoe, and the cams 1-I to give the desired form to the heel ofthe shoe. If the jaws are opened to their limit when forming thetoe-bend, as heretofore practiced, an imperfect bend is formed caused bythe great resistance of the wide middle part of the blank which preventsit from taking the shape of the former. By closing the jaws and firstengaging the blank near its middle part, that part is first bent to theshape of the former. Then by allowing the jaws to gradually open undercontrol of the descending cams H, H, the bend and form given the toeportion of the successive shoes are uniform and correct. After makingthe toe-bend, the jaws are partially closed to form the heel-portion ofthe shoe by means of the ascending cams H, H-.

' The several cams are made detachable and adjustable so that bychanging or adjusting the position of the cams, any desired form or sizeof shoe may be obtained with my improved machine.

The cams are provided with elongated boltholes H adapted to receive thebolts H by which they are detachably and adj ustably secured to thecam-bar H The cam-bar is also adj ustably secured to the main frame bymeans of the attaching-bolts H passing through holes in the flange A-and elongated bolt-holes 131 in the bar, and the adj ustingscrews Hinserted in screw-threaded apertures in the vertical flange A on themain frame.

The heel of the formed shoe, as shown by the dotted lines in Fig. 2,projects rearwardly of the forming-die in position to be engaged by thestripper-head, which in passing from the position shown by solid linesto that indicated by the dotted'lines in Fig. 3, first lifts the heel ofthe shoe from the die and then throws the shoe forward into the openingA in the main frame, through which it descends by gravity leaving thedie free to receive the next blank.

To remove the formed shoe from the die, the heel must be lifted abovethe narrow heelpart of the die, before a forward movement is imparted tothe shoe; otherwise the arms forming the heel of the shoe would bespread by the wider toe-part of the die. It is necessary therefore, topivot the stripper below and forwardly of the forming-die to give therequisite upward and forward movements at the proper times whenavibratory stripper is em-- ployed; and whatever the kind of movement,whether vibratory or reciprocatory, it must be first upward and thenforward over the die, to first free the shoe from the heel of theforming-die and then force the shoe laterally or forwardly off the die.

Various attempts have been heretofore made to construct a horizontalhorseshoebending machine with a stationary formingdie, that is a machinehaving the face of its forming-die in a horizontal plane, and thebending-jaws movable in a horizontal plane; but the difficulty inremoving the formed shoes from such a die caused the adoption of amovable die or the vertical form of machine wherein a reciprocatingright-line movement of the stripper in a single direction only is allthat is required to push the shoe from the die so that it will fall bygravity from the machine.

My improved form of stripper and operating mechanism enables me toemploy the horizontal type of machine with astationary forming-die whichcan be operated to do better work with greater convenience and certaintythan the vertical type, or the horizontal type employing a movableforming-die, as is well known to those skilled in the art.

The movements of the stripper and jawcarrier are so timed that thestripper engages the formed shoe while the jaws are at rest in theirextreme rearward position,and remains in its extreme forward positionwhile the jaws are passing the forming-die on their re turn to theirextreme forward position, which latter position is the one shown by thesolid lines in the drawings.

The object of the elliptical form of gears which connect the driving'shaft with the pitman-actuating crank-shaft is to produce. a rapidmovement of the jaw-carrier during its forward movement when the jawsare idle and a comparatively slow movement with corresponding increaseof power during the rearward movement of the carrier when the jaws arebending the blank to form a shoe. The increased power is especiallyuseful when the toe-benders engage the shoe-blanks near their middlepart.

The stripper-head shown in rear. elevation in Fig. .4, is detachablysecured to the stripper lever by means of two bolts and nuts .I'- andJ-, which enables me to attach heads of different sizes and forms tocorrespond with the size and form of forming-die employed.

J is an adjusting-nut, shown in Fig. 3, having its ends respectivelyright and left hand threaded and adapted tore'ceive the correspondinglythreaded ends of the two.- part pitman,wherebyl am able to adjust thelength of the pitman, to vary the movements of the jaw-carrier, byturning the nut.

J and J are lock-nuts for locking the parts in any adjusted position.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a horseshoe-bending machine, thecombination with a stationaryforming-die and bending-jaws mounted upon a horizontally movablecarrier, of a vibratory stripper pivoted below and forwardly of theforming-die, and mechanism for communicating vibratory movements to thestripper, whereby first an upward and then an upward and forwardmovement is imparted to the shoe by the stripper in removing the shoefrom the die, substantially as described.

2. In ahorseshoe-bending machine, the combination with a stationaryforming-die and bending-jaws mounted upon a horizontally movablecarrier, of a stripper movable up and down and transversely of the die,and mechanism for communicatingup and down and transverse movements tothe stripper, whereby the formed shoe isfirst lifted and released fromthe die by the upward movement of the stripper, and afterward removedfrom the die by a transverse movement of the stripper, substantially asdescribed.

3. In a horseshoe-bending machine, the commovable carrier, of a pair ofsegmental and link-connected elliptical gears, and operating connectionsbetween such gears and the strip,- per and carrier, substantially asdescribed.

In testimony whereof I have hereunto set my hand this 15th day of June,1893.

HENRY E. DARBY.

Witnesses GEO. A. MOSHER, FRANK G. CURTIS.

